I always run into this problem when designing pages. Although the div's width reads 100% in the CSS, I'm always left with about a ten pixel gap on both sides of the div box in both IE and FF.

http://img40.imageshack.us/img40/1797/problems.gif

Where the lime green box is is where the gap lies (the green box was added in Photoshop). It looks exactly the same on the opposite side as well. Basically I just want the content box to go from one edge of the screen to the other.